Numerical simulation of flow boiling from an artificial cavity in a microchannel

Rahim Jafari; Tuba Okutucu-OEzyurt

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Numerical simulation of flow boiling from an artificial cavity in a microchannel

机译：微通道内人工腔内流沸腾的数值模拟

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摘要

Cahn-Hilliard phase-field method is used to numerically simulate subcooled water boiling in which nucleation occurs from an artificial cavity on the inner surface of a microchannel. The boiling initiates from a cavity and the growth and departure of the nucleated bubbles from the cavity are simulated. The velocity, temperature and pressure distributions inside the microchannel have been analyzed. The bubble generation frequency increases by increasing inlet mass flux. For this case of study, the rising trend continues up to the mass flux of 64 kg/m~2 s. Further increase in the inlet mass flux does not accelerate the bubble formation. The radius and the shape of the generated bubble compared well with experimental data available in the literature.

机译：Cahn-Hilliard相场方法用于对过冷水沸腾进行数值模拟，其中微通道内表面上的人造腔发生成核。沸腾从腔开始，并且模拟了有核气泡从腔的生长和离开。分析了微通道内部的速度，温度和压力分布。气泡的产生频率通过增加入口质量流量而增加。对于本研究案例，上升趋势一直持续到质量通量达到64 kg / m〜2 s。入口质量通量的进一步增加不会加速气泡的形成。生成气泡的半径和形状与文献中提供的实验数据进行了比较。

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来源
《International Journal of Heat and Mass Transfer》 |2016年第6期|270-278|共9页
作者
Rahim Jafari; Tuba Okutucu-OEzyurt;
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作者单位

Department of Mechanical Engineering, Middle East Technical University, Dumlupinar Blv. No: 1, 06800 Ankara, Turkey,Mechanical Engineering Department, University of Turkish Aeronautical Association, Bahcekapi Quarter Okul Street No:11, 06790 Etimesgut, Ankara, Turkey;

Department of Mechanical Engineering, Middle East Technical University, Dumlupinar Blv. No: 1, 06800 Ankara, Turkey;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Bubble nucleation; Numerical simulation; Evaporation; Microchannel; Subcooled water; Artificial cavity;

机译：气泡成核;数值模拟蒸发;微通道;过冷的水;人造腔;

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Numerical simulation of flow boiling from an artificial cavity in a microchannel

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